3.5-Inch USB 2.0 External Aluminum Case Enclosure General Features: Silver color Aluminum external case Can be used with 3.5-inch drives 300 GB maximum drive supported USB 2.0 interface (Backwards compatible) Supports up to 480 Mbps data transfers Plug and Play Compact design Compatible with Windows and Macintosh systems Activity LED Power jack Unit Dimensions: 1.25 x 4.25 x 7.5-inches (H x W x D approximate) Regulatory Approvals: FCC CE